Methyl methacrylate-containing composition

Abstract

An object of the present invention is to provide a methyl methacrylate-containing composition having high storage and heat stability. This can be solved with a methyl methacrylate-containing composition containing methyl methacrylate, an ester compound having an alpha-hydrogen represented by Formula (1) (component A), and a polymerization inhibitor (component B), in which the concentration of methyl methacrylate is from 99% by mass to 99.99% by mass.

What is claimed is: 
     
         1 . A methyl methacrylate-containing composition, comprising:
 methyl methacrylate;   an ester compound having an alpha-hydrogen represented by the following Formula (1) (component A); and   a polymerization inhibitor (component B),   wherein the concentration of methyl methacrylate is from 99 to 99.99% by mass,   
       
         
           
           
               
               
           
         
         wherein, in Formula (1) above, 
         R 1  and R 2  each independently represent a hydrogen atom, an alkyl group, an alkenyl group, a hydroxy group, an alkoxy group, an amino group, a monovalent group containing a carbonyl group, or an alkylthio group, 
         R 3  represents an alkyl group or an aryl group, and 
         R 1  and R 2 , R 2  and R 3 , and R 3  and R 1  each may be linked to each other to form a ring. 
       
     
     
         2 . The methyl methacrylate-containing composition according to  claim 1 , wherein when the concentration of the component A is MA (μmol/L) and the concentration of the component B is MB (μmol/L), MB/MA is from 0.005 to 7. 
     
     
         3 . The methyl methacrylate-containing composition according to  claim 2 , wherein the MB/MA is from 0.05 to 5. 
     
     
         4 . The methyl methacrylate-containing composition according to  claim 1 , wherein when the concentration of the component A is MA (μmol/L), the MA is from 1 to 50,000 (μmol/L). 
     
     
         5 . The methyl methacrylate-containing composition according to  claim 4 , wherein the MA is from 10 to 30,000 (μmol/L). 
     
     
         6 . The methyl methacrylate-containing composition according to  claim 1 , wherein when the concentration of the component B is MB (μmol/L), the MB is from 1 to 5,000 (μmol/L). 
     
     
         7 . The methyl methacrylate-containing composition according to  claim 6 , wherein the MB is from 10 to 1,000 (μmol/L). 
     
     
         8 . The methyl methacrylate-containing composition according to  claim 1 , wherein the molecular weight of the component A is 1,000 or less. 
     
     
         9 . The methyl methacrylate-containing composition according to  claim 1 , wherein the component B is at least one polymerization inhibitor selected from the group consisting of a phenol compound, a quinone compound, a nitrobenzene compound, an N-oxyl compound, an amine compound, a phosphorus-containing compound, a sulfur-containing compound, an iron-containing compound, a copper-containing compound, and a manganese-containing compounds. 
     
     
         10 . The methyl methacrylate-containing composition according to  claim 1 , wherein the component B is at least one polymerization inhibitor selected from the group consisting of a phenol compound and a sulfur-containing compound. 
     
     
         11 . The methyl methacrylate-containing composition according to  claim 1 , wherein the component B is at least one polymerization inhibitor selected from the group consisting of hydroquinone, 4-methoxyphenol, 2,4-dimethyl-6-t-butylphenol, 2,6-di-t-butyl-4-methylphenol, and phenothiazine. 
     
     
         12 . The methyl methacrylate-containing composition according to  claim 1 , wherein the concentration of methyl methacrylate is from 99.8 to 99.99% by mass. 
     
     
         13 . The methyl methacrylate-containing composition according to  claim 1 , wherein the composition does not contain diacetyl, or the concentration of diacetyl contained is 55 (μmol/L) or less. 
     
     
         14 . The methyl methacrylate-containing composition according to  claim 1 , wherein in Formula (1),
 R 1  and R 2  are each independently a hydrogen atom, a C 1-5  alkyl group, a hydroxy group, a C 1-6  alkoxy group, an amino group, a monovalent group containing a carbonyl group, or a C 1-5  alkylthio group, and   R 3  is a C 1-5  alkyl group or a C 5-12  aryl group.   
     
     
         15 . The methyl methacrylate-containing composition according to  claim 1 , wherein in Formula (1),
 R 1  and R 2  are each independently a hydrogen atom or a C 1-5  alkyl group, and   R 3  is a C 1-5  alkyl group.   
     
     
         16 . The methyl methacrylate-containing composition according to  claim 1 , wherein in Formula (1),
 R 1  and R 2  are each independently a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, or an isopropyl group, and   R 3  is a methyl group.   
     
     
         17 . A method of producing a methyl methacrylate polymer, comprising a step of polymerizing a polymeric composition comprising a methyl methacrylate-containing composition according to  claim 1 . 
     
     
         18 . The method of producing a methyl methacrylate polymer according to  claim 17 , wherein the polymeric composition comprises a monomer that can be copolymerized with methyl methacrylate.